Lee Sin is a blind monk who sought redemption at the Shojin Monastery for a terrible mistake that cost innocent lives. In the midst of the Noxian invasion, his power became one with his flesh in a way none could have foreseen. With burning fists and inhumanly powerful roundhouse kicks, he fights those who dare despoil his homeland.

Muay Thai or, "The Art of Eight Limbs" is a Thai martial art that turns the human body into a weapon. Now, imagine if a ripped tiger-human hybrid was a Muay Thai master.
No need to imagine because I've drawn it! Check it out!